Just purchased from Bugholes recently. Indicated in and took the small cut shown on the chamber end. The dia. of the machined area is 1.087" and the length of cut is .715". Additional material would be removed to fit to any actions that are 1.062" tenon. This is a .300 bore .308 groove 5R barrel. Specs for No. 4 shown below. Barrel will finish at 28". Asking $360 shipped. This is a $100+ savings on this barrel blank.